Calling device for telephone-exchanges.



N0. 822,966. PATENTED JUNE 12, 1906. F. A. LUNDQUIST.

CALLING 133mm: FUR TELBPHONBEXGHANGES. APPLICATION FILED FEB. 6. 1905.

3 SHEETS-SHEET 1.

PATENTED JUNE 12, 1906.

P. A. LUNDQUIST.- CALLING DEVICE FOR TELEPHONE EXCHANGES.

APPLIGATION FILED FEB 6. 1905.

3 SHEETB-SHEET 2' Invenfor WiTnesaas PATENTBD JUNE 12, 1906 F. LB'NDQUIST.

OALLING DEVICE FOR. TELEPHONE EXCHANGES.

APPLIOATIOH FILED P216. 1905.

3 SHEETS-SHEET 3 F" f: F .5.

Ill

Fig.

Fig.6.

2 WiTneaaes: I t Aaflwfu' Q M4 W FRANK A. LUNDQUIST, OF onioaeo, ILLINOIS.

CALLlNG DEVICE FOR T ELEPHONE-EXOHANGES.

IltTo, 822,966. Specification of Letters Patent. Patented June 12, 1906.

Application as Iahruary c.1905. Serial in. 244,344.

To all whom it may concern:

.Be it known that I, FRANK A. Lunnours'r a citizen of the United States of America, an V a resident of Chicago, county of Cook, and

State of Illinois, have invented certain new and useful Improvements in Calling Devices for Telephone-Exchanges, of which the following is a specification.

My invention relates to calling devices for automatic telephone-exchan es, and has for its object improvements in t e construction and o eration of such exchanges.

In t e accom anyin drawin s, Figure 1 is an elevation o the to ephone ox, showing the calling device in position. Fig. 2 is an elevation of the calling device with the front plate removed. Fig. 3 is a section on line 3 3 of Fig. 2. Fig. 4 is a bottom view of Fig. 2 with the front plate in position. Fig. 5 1s a rear view of Fi 2, and Fig. 6 is a view similar to Fig. 5 wit the upper parts removed.

The front late A has a series of numbers A on one e o. Back of this is a second plate A, and Iietween these plates are the le vers B and C, mounted upon a s pindle A The lever C is fast on the s indie A and has a pointer 0" arranged to in icate different positions when moved to the numbers A of Fig. 1. The lever B is loose on the spindle A and has a spring B, Fig. 3 which tends to move it to the left, as shown in Figs. 1 and 2, until it is stopped by astud A between plates A and A. On one side of the lever B is a lug B, adapted to engage the lever C and move it forward to the ri ht when the lever B is moved in that direction by hand.

On thee indie A is a spring A, which is wound up liy the lever 0 when it is moved from its normal position and which acts to return that lever to its normal position. The' spindle A is connected by a train of gears with a spindle D. In this train is a ratchetwheel A, arranged so that the spindle D is not moved when the lever G is moved from its normal position, but is driven during the return movement of the lever under the action of spring A On the spindle D is a pin D, which is engaged on opposite sides by arms E and E", and 1) these arms and this pin the spindle is kept om turning until it is released. The arm E is one of three arms of a lever pivoted at E, as shown in Fig. 5. The other arms are E and E. On the s indie A is an arm N, which when the lever is at its normal position engages the BJIRET', so as to force the arm E into the position of en gaging pin D, as shown in Fig. 6. When the arm B is moved by hand from its normal position, it carries the arm 0 with it and turns the spindle A so as to remove the arm A from the arm E so that the arm E me be moved from in D when acted upon; Vl hen the lever B 18 released from the hand of the bperator, the spring causes it to fly back to its normal position. Just as the lever Breaches its normal position a pin 13 thereon strikes a flexible extension E on the arm E and causes the arm E to free the pin D so that the s ring A may return the lever C and ldrive 't e earin connecting to spindle D. When the ever. reaches its normal position, the arm A, which is connected thereto through the spindle A, strikes the arm E and forces the end of arm E intothe path of the pin D, so as to stop the rotation of the spindles D and A", the flexibility of the extension E ermitting this actionwhen the lever B and its pin B are in normal osition. When the lever B is a ain advance the pin B moves a away from and thus revents a release of D in consequence of A eavingE.

On the s indle D is a governor mechanism F for regu ating the speed of the 5 indie under the action of the sprin A. A so on the spindle D is a contact-dis F, which is normally free from an insulated contacbspring F but is ada ted to make electrical connection therewit once during each rotation of the spindle D. The gearing between A and D is so arranged that one such electrical connection is made during the time while the pointer C is passin throu h the space from one number to anot er on thedin A On the ratchet-wheel A is a in A adapted to engage the inner end 0 a bell-crank lever G, igs. 4 and 6, and normall hold it in the position shown. When the ever B is moved by hand, the in A leaves the lever G, so that the sprin ma bring the other end a ainst the note ed dis D When the arm 2 is removed from pin D, ,so that spindle D may rotate, said pin moves the arm E? outward. In this osition the lever G en ges the notch in isk Dandas D and 1% are, connected to other holds the arm away from in D until the pin A again strikes G an lifts it from the notch.

a notch adapted to be engage by a dog H on the lever B. On the level C is a Lpin H, adapted to enga e a tailpiece secure to the dog H and hol said dog from engagement On the plate A? is a block rovided with with the block H. These parts are so arber on the dial A which he wishes to call ranged that when the levers B and C are in through operating his calling device. If he t eir normal relationship to each other the stops with C pointing to 6 and releases B, dog H will not engage the block H, but when then as soon as B reaches normal position (1' 5 the are separated the dog is free to make begins to return. During this return the 70 suc engagement. contact-maker F engages spring F six times he operation of the parts so far described while the pointer C is moving from 6 to is as follows: The operator moves the leverB 1. Just after the pointer C asses 1 from its normal position, carryin the lever on the dial the segment K passes rom spring (l with it. This frees the lever (1 but does M, and at the time F makes its seventh con- 75 not cause a movement of the operating parts. tact the pro'ection K engages spring N. If When the operator permits the lever B to the pointer had been moved to 7 or to move backward under the action of spring "8, then the number of contacts made B, the lever C does not go back with it, but would have been correspondingly seven or :5 remains. stationary, with the ointer C eight before K left M, with one contact as a o pointing to the figure on the dial A, which terminal of the series made when K engaged re resents the extreme forward position to N. Each time that F en ages F a current which it was moved b the operator. This flows from the battery X t rough the spring condition exists until the lever B reaches its F, contact-maker F, mass of the device to normal position and releases the arm E" on K is in engagement with M then 85 from in D. This in turn releases the lever these impulses flow out over line M. When 0 an permits it to return under action of K is in engagement with N, then an impulse spring A, causin a series of contacts to be flows out over the line N. The general remade by F and During the time while sult is that upon moving the ointer to a 2 5 the lever C is making this return movement given number on the dial and re easing it the 9 thedog His in engagement with the block H, return movement causes as many impulses and the lever B cannot be moved forward to to flow over the line M as were indicated by interrupt the return movement of C until 0 the pointer and also one extra impulse to reaches its normal position and releases H flow over the line N. The present applicafrom H. More briefly stated, C is moved tion is for an improvement in devices for ac- 95 forward by B; but C is locked against return com lishing this general result. movement until released by B reaching norat I claim 1s mal osition. When B releases 0, B is 1. In a calling device, an indicator, a handlocke against forward movement until reoperated device for moving said indicator to 5 leased by C reachin normal position. Seany desired point, means by which said indi- I00 cured to the spindle 5 and moving therewith cator is locked in its advanced position during is a segment of a disk K, having a projection the return movement of said device, and

which is separated from the mam portion means by which said device upon reaching by an intervenin notch. At convenient its normal position will release said indicator points are insulate contactprings M and N, so that it may also return toits normal posim 5 W 'ch are normally out of en agement with tion. the disk and its projection, ut which are 2. In a calling device, two levers arranged adapted to be enga ed b them when the to be moved simultaneously from their norspindle A is rotate Wlien the lever B is mal position by the hand applied to one of 5 advanced, the projection K enga es spring them, and automatically-o )erating means by 110 N, and immediate! after leaving that spring which n on releasing said evers they will be the main body of tile segment enga es spring returne independently and successively to M and remains in that connection Efill'lll the their normal osition. remainder of the forward movement. This, 3. In a ca ling device, the combination so however, is without e'flect and is nothing with an indicator, and a hand-operated de- 115 more than setting the device for desired imvice for moving it from its normal position, pulses. During the return movement the of means by which said device and said indicontact maker F engages the insulated catorare returned independently to their norspring F a series of times while connection mal position, and means by which each is is made between K and M and once while held 1n a locked position while the other is 120 connection is between K and N. The conmaking its return movement. tact-making disk F and the segment K and 4. In a calling device, two levers arranged its rejection K are in electrical connection to be moved from their normal position by wit each other through the mass of the callhand, automatically-o crating means for reing device. From the spring F a wire leads turning them indepem ently and sneoessivelv I 2 5 to a battery X, and from the s rings M and N to their normal position, and means by which extend the wires M and N, which ultimately each is held in a locked position while the lead from the calling device to the central other is making its return movement. office. The operator moves the lever B by 5. In a calling device, a hand-opemted lehand until the pointer 0 points to the numver, an indicator moved thereby, aspringfor 1 o urn, to normal position, a=contact-ma1nng device, and means bywhich-said contactro indicator.

r. 5 pointer making deviceis o erated' a nredetermined f "number of times uring ,the return of said 6, A numbered dial, a pointer adapted to beqmoved by hand to anynumbe'r' on-ssid dial, automatically-operating means'by which upon the ratorremovin hand; said remain for a ort, interval; of

'time at the indicated number and thenwill return to its normal position, and means con trolled by the return movement K pointer for making .a series of electrical Iconso tacts.

' 7. An indicator adapted to beset for any desired selection, automatically-operatin means for holding said indicator fora brie Feriod of time at its set position and ionic,

easing it, a spring for returning it to a no:- me! position when so released, and a contactclosing device operated a successive number of times by the return mqrementl 8. In a calling device arranged to "sends o desired number of impulses over one line and one additional im ulse over asecond linger: indicator adapts to beset for the desired number of imxulses, means for temporarily lockin the in 'cator at its set position ,automatica y-operat'. means for releasing said: indicator and causing it to return to itsnorma] position, and means by which the. 1 e quired impulses are sent over said lines during such returnmovcment.

9. The combination with a numbereddial, a pointer, and a handsoperated device for movin said pointer to any number on said dial, 0 springs for'retumi-n said device and said pointer to their norma positions, a lock for holding said pointer itsset position disk, a contact-maker provided after being while said, device is returning to its normal osition, means .for releasing said pointer by the final part of the return movement of said 7 device, so thetthc pointer me ,to normaliposition', and a second ock for holdsaid e said pointeris making its return movement" 10'. 'Ifhe combination with a disk, two contact-springsnormallydlsoonnected from said adapted to send electrical impulses to and through said disk, and a pointerfconnected to said disk, of a numbored dial to any number on which said pointer maybe moved by hand, a spring for ret said pointer to its normal position,

saiddisk eing in connection with one or the other of said contact s ringlsnduring such return movement,means -yw ohsai contactmaker is operated during the return movement of said pointer soas to send as many imgnlses through one of said springs as was in 'cated on said dial and also one extra impulse through the other spring, y

'1 1 The, combination with a contact maker provided with a handle by means of which an operator may 'set said contactmaker for the desired number of contacts,

makingfoi any starting said contact-maker and'ime'ans for .into operation after being so set, of means for preventingthe operator from manipulating the handle fsoas tointerfere with theoperation oitliej cont a'sit-makerw during] the time while, it ismeaking its contacts; a

12. Thecombination with a contact-maker handle by which it is set, and

with'a V apowerdevice for operatingi said contact set, of clocking office for pre:

venting the handle from interfering with the 1 operation of said contact maker.

Signed at Chicago, Illinois, this 3dday of February, 1905.

, r FRANK A. LUNDQUIST. Witnesses:

A. L. BUOHANANI, C. L. Rnnrmm.

also return 7 V109 at its normal position while 

